Pretty sure we're not overfeeding. One small shake of flakes (like, 6 flakes fall out) in the morning, they eat it all fast, one similar shake in the evening (again, none leftover).
We got a small tank with filter & light and it's plastic not glass, so nowhere near as cold.
Re: dandelionmom
Hmm, that sounds good. But I don't really know much about fish food. Maybe you could call a fish store and ask about flake food? maybe they'd be okay with just one feeding a day?